Eight component 100x microscope objective

ABSTRACT

An eight component apochromatic oil immersion microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.30.

asu-ew 7 United St 1 3,700,31 1 Shoemaker 1 Oct. 24, 1972 [S4] EIGHT COMPONENT 100x [561 References Cited MICROSCOPE OB ECTIVE J UNITED STATES PATENTS [72] Inventor: Arthur 1-1. Shoemaker, East Aurora,

2,644,943 7/1953 Klein ..350/214 X 3,437,398 4/1969 Muller et al. ..350/214 X [73] Assxgnee: American Optical Corporation,

southbndge Mass' Primary Examiner-John K. Corbin [22] Filed; 22, 197 Attorney-William C. Nealon et a1. [211 App]. No.: 200,688 57 ABSTRACT An eight component apochromatic oil immersion [52] U.S. Ci ..350/214, 350/175 ML, 350/176, microscope objective having a magnification of 350/177 stantially 100X and a numerical aperture of substan- [51] Int. Cl. ..G02b 21/02 tially 1-30. [58] Field of Search. ..350/176, 177, 175 ML, 214

2 Claims, 1 Drawing Figure EIGHT COMPONENT IOOX MICROSCOPE OBJECTIVE BACKGROUND OF INVENTION This invention relates to improvements in a microscope objective, and in particular to an apochromatic oil immersion microscope objective with a magnification of substantially lX and a numerical aperture of substantially 1.30. It is the object of the present invention to provide such a microscope objective which is well corrected for chromatic image aberrations over the entire visible spectrum as well as spherical aberration, coma, and astigmatism, while having a substantially flat image field when used with a telescope objective as described in US. Pat. No. 3,355,234, issued to Robert M. Muller.

DRAWING The drawing is an optical diagram of a microscope objective according to the present invention.

DESCRIPTION Referring now to the drawing, a microscope objective is generally indicated at 2. It includes the following eight components: a front doublet 4, a single lens 6, a doublet 8, a doublet 10, a doublet 12, a doublet 14, a single lens 16, and a doublet 18, all of said components being optically aligned. Objective 2 is shown disposed relative to an object plane 20 supporting a specimen and cover glass 22 with immersion oil in in the space between cover glass 22 and the front lens element.

Doublet 4 includes a plane-convex lens element I and a concavo-convex lens element II, together forming a plano-convex doublet. Lens 6 is a concavo-convex positive meniscus shaped lens, also designated III. Doublet 8 includes a convex-concave lens element IV and a double convex lens element V, together forming a double convex doublet. Doublet 10 includes a double concave lens element VI and a double convex lens element VII, together forming a concavo-convex doublet. Doublet 12 includes a double convex lens element VIII and a double concave lens element IX, together forming a convex-concave doublet. Doublet 14 includes a double convex lens element X and a concavo-convex lens element XI, together forming a double convex doublet. Lens 16 is a convex-concave single lens also designated XII. Doublet 18 includes a double concave lens element XIII and a double convex lens element XIV, together forming a concave-convex doublet.

The parameters of the lens elements which make up the objective are as listed in the following table in which ND is the refractive index for the D line of sodium and is the Abbe number. Radii (R), thicknesses (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens.

MAGNIFICATION IOOX N.A. 1.30

1 r1-0.29001= NDl- 0.9047F 11 r2-1.s9161= ND2- 1.96028 7 2-34.0i as s2-0.01o91= R4 6.1208F 111 ra-1.11621= ND3= 1.78833 7 3 =50.4'/ RS 3.3813F s 2-0.1641F R6 7.9280F 1v T40.6566F N04- 4.1993F I v rs-zsnsr NDS- I.4338I 7 5-94.92 R8 s4-o.osm= R9 12.4ss3l= v1 T6-0.6566F ND6- 1.65002 1 6-39.13 R10- 3.7ss9F v11 r1-2.24asr -127- l.4338l y 7-94.92 RI 1- 7.36OIF ss-o.os47i= R12 5.0mm v11r Ts-3s27F Noa- 1.43am y 8-94.92 R13- 5.9260F IX T9-0.6566F ND9- S6-0.0547F Ris- 5.926OF x r10-2.0791r= NDl0= 5.9260F x1 r11-0.6s661= NDl 1= 1.6 333 7 11= s 9 .19 RI7= 5.92605 S7-0.0547F R18- 5.9260$.9270F X 1-1 2-2.2980F NDl2= sa=0.9s27F R 20- 1.8472F x111 Tl3-0.547IF Nois- L78833 713-5047 R2 I= 4.1993r XIV Tl4-L3678F NDI4= F= 1.8277 MAGNIFICATION= lOOX N.A. I .30

Lens Refractive Index Abbe Number Radius Thickness Space R T S 51-03711 R1 Plano Tl -o.s3 NDl 1.653s 11 T2 -2.92 ND2 52-002 R4 -1 1.187 111 T3 =2.04 ND3 14.490 1v T4 =1.20 ND4 1.72029 4 -34.s9 R7 7.675 v T5 =4.70 ND5 s4=o.10 R9: 22.770 v1 'l6=1.20 ND6- 6.925 v v11 T7 =4.10 ND7 1.43381 7 =94.92 Rl 1= 13.4s2

s5=0.10 R12= 9.300 v111 T8 =4.30 ND8 1.43381 8 =94.92 R13= l0.83l 1x T9 =1.20 ND9= 1.72029 9 =34.s9 Rl4= 26.265

S6=0.l0 R15= 10.831 x Tl0=3.80 N1310- 1.43381 10-9492 R16= -10.831 x1 Tll=|.20 NDI|= 1.66983 11=39.19 Rl7= -10.s31

s7==0.10 Rl8= 10.2131 x11 Tl2=4.20 ND12= S8=l.796 R20= 3.376 x111 Tl3=l.00 N1313- 7.67s x1v Tl4=2.50 ND14= 1.7a44e 14=2s.7s R22= 7675 What is claimed is:

aperture of substantially 1.30 for forming an image of an object, said image being well corrected for chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising the following components:

a front plano-convex lens element I;

a second concavo-convex lens element 11;

said front and second elements forming a doublet;

a third concavo-convex lens Ill;

a fourth convex-concave lens element IV;

a fifth double convex lens element V;

said fourth and fifth elements forming a doublet;

a sixth double concave lens element VI;

a seventh double convex lens element VII;

said sixth and seventh elements forming a doublet;

an eighth double convex lens element VIII;

a ninth double concave lens element 1X;

said eighth and ninth elements forming a doublet;

a tenth double convex lens element X;

an eleventh concave-convex lens element X1;

said tenth and eleventh elements forming a doublet;

a twelfth convex-concave lens XII;

a thirteenth double concave lens element XIII;

a fourteenth double convex lens element XIV;

said thirteenth and fourteenth elements forming 'a doublet;

the parameters of lens radii (R), thicknesses T), spacings (S), refractive indiees (ND), and Abbe numbers (7), being determined by the following relationship wherein radii, thicknesses, and spacings are expressed in millimeters:

MAGNIFICATION x NA. 1.30

Lens

Refractive Abbe Index Num ber Radius Thickness Space R T 8 VII T7=2.2433F Tl-0.2900F NDI- 1.51700 7 1-64.so R2 s2-0.0109F R4 6. mar

T3=I=1.1162F NDB- ND7- 1.43381 7 7-94.92 R1 1 7.3601F S5-0.0547F R12- 5.0884F VIII T8=2.3527F ND8- 5.9260F IX T9-0.6566F ND9- S6-0.0547F R15= 5.9260F X T10=2.079IF NDIO- 5.9260F XI TI I=0.6566F NDI1= 1.66983 11=39.l9 Rl7= S7=0.0547F Rl8== 5.9260F XII TI2=2.2980F NDIZ- 1.72029 y12=34.59 R19= 2.6263F S8=0.9827F R20= 1.8472F XIII TI3=O.5471F ND13= 1.78833 'y13=50.47 R21= 4.1993F XIV Tl4=l.3678 NDI4= 2. An apochromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.30 for forming an image of an object, said image being well corrected for chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising the following components:

a front plano-convex lens element I;

a second concavo-convex lens element 11;

said front and second elements forming a doublet;

a third concavo-convex lens III;

a fourth convex-concave lens element IV;

a fifth double convex lens element V;

said forth and fifth elements forming a doublet;

a sixth double concave lens element VI;

a seventh double convex lens element VII;

said sixth and seventh elements forming a doublet;

an eighth double convex lens element VIII;

8 ninth double concave lens element IX;

said eighth and ninth elements forming a doublet;

a tenth double convex lens element X;

eleventh concavo-convex lens element XI;

said tenth and eleventh elements forming a doublet;

a twelfth convex-concave lens XII;

a thirteenth double concave lens element XIII;

a fourteenth double convex lens element XIV said thirteenth and fourteenth elements forming a doublet;

the parameters of lens radii (R), thicknesses (T),

spacings (S), refractive indices (ND), and Abbe numbers (y), being determined by the following relationship wherein radii, thicknesses, and spacings are expressed in millimeters:

F= 1.8277 MAGNIFICATION=100X N.A. =1.30

Lens Radius Thickness Space Refractive Abbe R T S Index Number 81-03711 RI I Plano I T1 -0.53 ND1 1.6535 11 T2 -2.92 ND2 I S2=0.02 R4 -1 1.187 111 T3 =2.04 ND3 53-030 R6 14.490 IV T4 =1.20 ND4- 1.72o29 4 =34.s9 R7 7.675 V T5 =4.70 NDS 22.770 VI T6 =1.20 ND6 1.65002 7 6 =39.I3 RIO- 6.925 VII T7 =4.10 ND7 S50.10 RI2= 9.300 VIII T8 =4.30 ND8 1.43381 y 8 =94.92 R13= I0.83I IX T9 =1.20 ND9 S6=0.10 R15= 10.831 X T10==3.80 NDIO- 1.43381 10=94.92 R16- 10.83l XI 11==1.20 -ND11= 1.66983 y11=39.19 Rl7= l0.831

S70.10 R18 10.831 XII TI2=4.20 NDIZ- 1.72029 'yl2=34.59 R19= 4.800

3.376 XIII T13=1.00 NDIB- 1.78833 13-5047 R2I= 7.675 XIV T14 250 ND14 1.78446 'yl4=25.75 R22= 7.675 

1. An apochromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.30 for forming an image of an object, said image being well corrected for chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising the following components: a front plano-convex lens element I; a second concavo-convex lens element II; said front and second elements forming a doublet; a third concavo-convex lens III; a fourth convex-concave lens element IV; a fifth double convex lens element V; said fourth and fifth elements forming a doublet; a sixth double concave lens element VI; a seventh double convex lens element VII; said sixth and seventh elements forming a doublet; an eighth double convex lens element VIII; a ninth double concave lens element IX; said eighth and ninth elements forming a doublet; a tenth double convex lens element X; an eleventh concavo-convex lens element XI; said tenth and eleventh elements forming a doublet; a twelfth convex-concave lens XII; a thirteenth double concave lens element XIII; a fourteenth double convex lens element XIV; said thirteenth and fourteenth elements forming a doublet; the parameters of lens radii (R), thicknesses (T), spacings (S), refractive indices (ND), and Abbe numbers ( gamma ), being determined by the following relationship wherein radii, thicknesses, and spacings are expressed in millimeters: MAGNIFICATION 100X N.A. 1.30 Lens Radius Thickness Space Refractive Abbe R T S Index Number ND gamma S1 0.2031F R1 00 I T1 0.2900F ND1 1.51700 gamma 1 64.50 R2 - 0.9047F II T2 1.5976F ND2 1.96028 gamma 2 34.91 R3 - 1.5254F S2 0.0109F R4 - 6.1208F III T3 1.1162F ND3 1.78833 gamma 3 50.47 R5 - 3.3813F S3 0.1641F R6 7.9280F IV T4 0.6566F ND4 1.72029 gamma 4 34.59 R7 4.1993F V T5 2.5715F ND5 1.43381 gamma 5 94.92 R8 - 4.1993F S4 0.0547F R9 -12.4583F VI T6 0.6566F N 6 1.65002 gamma 6 39.13 R10 3.7889F VII T7 2.2433F ND7 1.43381 gamma 7 94.92 R11 -7.3601F S5 0.0547F R12 5.0884F VIII T8 2.3527F ND8 1.43381 gamma 8 94.92 R13 - 5.9260F IX T9 0.6566F ND9 1.72029 gamma 9 34.59 R14 14.3705F S6 0.0547F R15 5.9260FX T10 2.0791F ND10 1.43381 gamma 10 94.92 R16 - 5.9260F XI T11 0.6566F ND11 1.66983 gamma 11 39.19 R17 - 5.9260F S7 0.0547F R18 5.9260F XII T12 2.2980F ND12 1.72029 gamma 12 34.59 R19 2.6263F S8 0.9827F R20 - 1.8472FXIII T13 0.5471F ND13 1.78833 gamma 13 50.47 R21 4.1993F XIV T14 1.3678 ND14 1.78446 gamma 14 25.75 R22 - 4.1993F
 2. An apochromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.30 for forming an image of an object, said image being well corrected for chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising the following components: a front plano-convex lens element I; a second concavo-convex lens element II; said front and second elements forming a doublet; a third concavo-convex lens III; a fourth convex-concave lens element IV; a fifth double convex lens element V; said forth and fifth elements forming a doublet; a sixth double concave lens element VI; a seventh double convex lens element VII; said sixth and seventh elements forming a doublet; an eighth double convex lens element VIII; a ninth double concave lens element IX; said eighth and ninth elements forming a doublet; a tenth double convex lens element X; eleventh concavo-convex lens element XI; said tenth and eleventh elements forming a doublet; a twelfth convex-concave lens XII; a thirteenth double concave lens element XIII; a fourteenth double convex lens element XIV said thirteenth and fourteenth elements forming a doublet; the parameters of lens radii (R), thicknesses (T), spacings (S), refractive indices (ND), and Abbe numbers ( gamma ), being determined by the following relationship wherein radii, thicknesses, and spacings are expressed in millimeters: F 1.8277 MAGNIFICATION 100X N.A. 1.30 Lens Radius Thickness Space Refractive Abbe R T S Index Number ND gamma S1 0.3711R1 Plano I T1 0.53 ND1 1.51700 gamma 1 64.54 R2 - 1.6535 II T2 2.92 ND2 1.96028 gamma 2 34.91 R3 - 2.788 S2 0.02 R4 -11.187 III T3 2.04 ND3 1.78833 gamma 3 50.47 R5 -6.180 S3 0.30 R6 14.490 IV T4 1.20 ND4 1.72029 gamma 4 34.59 R7 7.675 V T5 4.70 ND5 1.43381 gamma 5 94.92 R8 - 7.675 S4 0.10 R9 -22.770 VI T6 1.20 ND6 1.65002 gamma 6 39.13 R10 6.925 VII T7 4.10 ND7 1.43381 gamma 7 94.92 R11 -13.452 S5 0.10 R12 9.300 VIII T8 4.30 ND8 1.43381 gamma 8 94.92 R13 -10.831 IX T9 1.20 ND9 1.72029 gamma 9 34.59 R14 26.265 S6 0.10 R15 10.831 X T10 3.80 ND10 1.43381 gamma 10 94.92 R16 -10.831 XI 11 1.20 ND11 1.66983 gamma 11 39.19 R17 -10.831 S7 0.10 R18 10.831 XII T12 4.20 ND12 1.72029 gamma 12 34.59 R19 4.800 S8 1.796 R20 - 3.376 XIII T13 1.00 ND13 1.78833 gamma 13 50.47 R21 7.675 XIV T14 2.50 ND14 1.78446 gamma 14 25.75 R22 - 7.675 